「Spring认证」Spring Bean 定义教学
<p style="margin-top: 0px; margin-bottom: 8px; list-style: inherit; min-height: 24px; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;">构成应用程序主干并由 Spring IoC 容器管理的对象称为<strong style="list-style: inherit;">beans</strong>。bean 是由 Spring IoC 容器实例化、组装和管理的对象。这些 bean 是使用您提供给容器的配置元数据创建的。例如，您在前面的章节中已经看到的 XML <bean/> 定义的形式。</p><p style="margin-top: 0px; margin-bottom: 8px; list-style: inherit; min-height: 24px; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;">Bean 定义包含称为<strong style="list-style: inherit;">配置元数据</strong>的信息，容器需要了解以下信息 -</p><ul style="margin-top: 0px; margin-bottom: 16px; margin-left: 0px; list-style: none; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;"><li style="margin-bottom: 4px; padding-left: 18px; list-style-type: none; position: relative;">如何创建一个bean</li><li style="margin-bottom: 4px; padding-left: 18px; list-style-type: none; position: relative;">Bean 的生命周期细节</li><li style="margin-bottom: 4px; padding-left: 18px; list-style-type: none; position: relative;">Bean 的依赖</li></ul><p style="margin-top: 0px; margin-bottom: 8px; list-style: inherit; min-height: 24px; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;">所有上述配置元数据转换为一组以下属性，这些属性构成每个 bean 定义。</p><div style="margin-top: 12px; margin-bottom: 12px; list-style: inherit; outline: none; position: relative; overflow-x: auto; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;"><table style="list-style: inherit; width: 734px; margin-top: 0px; margin-bottom: 0px;"><thead style="list-style: inherit;"><tr style="list-style: inherit;"><th style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-bottom-width: 1px; border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial; background-color: rgb(245, 247, 250); color: rgb(103, 116, 137); text-align: left; font-weight: normal; word-break: keep-all;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">不</p></div></th><th style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-bottom-width: 1px; border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial; background-color: rgb(245, 247, 250); color: rgb(103, 116, 137); text-align: left; font-weight: normal; word-break: keep-all;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">属性和描述</p></div></th></tr></thead><tbody style="list-style: inherit;"><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">1</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">班级此属性是强制性的，指定用于创建 bean 的 bean 类。</p></div></td></tr><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">2</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">名称此属性唯一指定 bean 标识符。在基于 XML 的配置元数据中，您使用 id 和/或 name 属性来指定 bean 标识符。</p></div></td></tr><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">3</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">范围此属性指定从特定 bean 定义创建的对象的范围，将在 bean 范围一章中讨论。</p></div></td></tr><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">4</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">构造函数参数这用于注入依赖项，将在后续章节中讨论。</p></div></td></tr><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">5</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">特性这用于注入依赖项，将在后续章节中讨论。</p></div></td></tr><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">6</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">自动装配模式这用于注入依赖项，将在后续章节中讨论。</p></div></td></tr><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">7</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">延迟初始化模式一个延迟初始化的 bean 告诉 IoC 容器在它第一次被请求时创建一个 bean 实例，而不是在启动时。</p></div></td></tr><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">8</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">初始化方法在容器设置了 bean 的所有必要属性之后调用的回调。这将在 bean 生命周期章节中讨论。</p></div></td></tr><tr style="list-style: inherit;"><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">9</p></div></td><td style="padding: 12px 16px; list-style: inherit; border-top: 1px solid rgb(225, 230, 240); border-left: 1px solid rgb(225, 230, 240); border-right-color: rgb(225, 230, 240); border-bottom-color: rgb(225, 230, 240); border-image: initial;"><div style="list-style: inherit;"><p style="margin-top: 0px; margin-bottom: 0px; list-style: inherit; min-height: 24px;">销毁方法销毁包含 bean 的容器时使用的回调。这将在 bean 生命周期章节中讨论。</p></div></td></tr></tbody></table></div><h1 id="Spring-%E9%85%8D%E7%BD%AE%E5%85%83%E6%95%B0%E6%8D%AE" name="Spring-%E9%85%8D%E7%BD%AE%E5%85%83%E6%95%B0%E6%8D%AE" style="margin-top: 16px; margin-bottom: 12px; font-size: 20px; list-style: inherit; font-weight: bold; line-height: 28px; font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;">Spring 配置元数据</h1><p style="margin-top: 0px; margin-bottom: 8px; list-style: inherit; min-height: 24px; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;">Spring IoC 容器与实际写入此配置元数据的格式完全分离。以下是为 Spring Container 提供配置元数据的三种重要方法 -</p><ul style="margin-top: 0px; margin-bottom: 16px; margin-left: 0px; list-style: none; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;"><li style="margin-bottom: 4px; padding-left: 18px; list-style-type: none; position: relative;">基于 XML 的配置文件。</li><li style="margin-bottom: 4px; padding-left: 18px; list-style-type: none; position: relative;">基于注解的配置</li><li style="margin-bottom: 4px; padding-left: 18px; list-style-type: none; position: relative;">基于Java的配置</li></ul><p style="margin-top: 0px; margin-bottom: 8px; list-style: inherit; min-height: 24px; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;">您已经看到了如何向容器提供基于 XML 的配置元数据，但让我们看看另一个基于 XML 的配置文件示例，其中包含不同的 bean 定义，包括延迟初始化、初始化方法和销毁方法 -</p><pre style="list-style: inherit; margin-top: 0.5em; margin-bottom: 0.5em; padding: 1em; color: rgb(204, 204, 204); background: rgb(80, 85, 107); border-radius: 3px; font-family: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace; overflow-wrap: normal; white-space: pre; word-break: normal; tab-size: 4; hyphens: none; font-size: 14px;"><span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">?</span>xml version <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"1.0"</span> encoding <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"UTF-8"</span><span style="list-style: inherit; color: rgb(103, 205, 204);">?</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span>beans xmlns <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"http://www.springframework.org/schema/beans"</span>
xmlns<span style="list-style: inherit;">:</span>xsi <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"http://www.w3.org/2001/XMLSchema-instance"</span>
xsi<span style="list-style: inherit;">:</span>schemaLocation <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> "http<span style="list-style: inherit;">:</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>www<span style="list-style: inherit;">.</span>springframework<span style="list-style: inherit;">.</span>org<span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>schema<span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>beans
http<span style="list-style: inherit;">:</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>www<span style="list-style: inherit;">.</span>springframework<span style="list-style: inherit;">.</span>org<span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>schema<span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>beans<span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>spring<span style="list-style: inherit; color: rgb(103, 205, 204);">-</span>beans<span style="list-style: inherit; color: rgb(240, 141, 73);">-3.0</span><span style="list-style: inherit;">.</span>xsd"<span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> A simple bean definition <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span>bean id <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span> <span style="list-style: inherit; color: rgb(204, 153, 205);">class</span> <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> collaborators and configuration <span style="list-style: inherit; color: rgb(204, 153, 205);">for</span> <span style="list-style: inherit; color: rgb(204, 153, 205);">this</span> bean go here <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>bean<span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> A bean definition <span style="list-style: inherit; color: rgb(204, 153, 205);">with</span> lazy init <span style="list-style: inherit; color: rgb(204, 153, 205);">set</span> on <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span>bean id <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span> <span style="list-style: inherit; color: rgb(204, 153, 205);">class</span> <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span> lazy<span style="list-style: inherit; color: rgb(103, 205, 204);">-</span>init <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"true"</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> collaborators and configuration <span style="list-style: inherit; color: rgb(204, 153, 205);">for</span> <span style="list-style: inherit; color: rgb(204, 153, 205);">this</span> bean go here <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>bean<span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> A bean definition <span style="list-style: inherit; color: rgb(204, 153, 205);">with</span> initialization method <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span>bean id <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span> <span style="list-style: inherit; color: rgb(204, 153, 205);">class</span> <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span> init<span style="list-style: inherit; color: rgb(103, 205, 204);">-</span>method <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> collaborators and configuration <span style="list-style: inherit; color: rgb(204, 153, 205);">for</span> <span style="list-style: inherit; color: rgb(204, 153, 205);">this</span> bean go here <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>bean<span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> A bean definition <span style="list-style: inherit; color: rgb(204, 153, 205);">with</span> destruction method <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span>bean id <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span> <span style="list-style: inherit; color: rgb(204, 153, 205);">class</span> <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span> destroy<span style="list-style: inherit; color: rgb(103, 205, 204);">-</span>method <span style="list-style: inherit; color: rgb(103, 205, 204);">=</span> <span style="list-style: inherit; color: rgb(126, 198, 153);">"..."</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> collaborators and configuration <span style="list-style: inherit; color: rgb(204, 153, 205);">for</span> <span style="list-style: inherit; color: rgb(204, 153, 205);">this</span> bean go here <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>bean<span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">!</span><span style="list-style: inherit; color: rgb(103, 205, 204);">--</span> more bean definitions go here <span style="list-style: inherit; color: rgb(103, 205, 204);">--</span><span style="list-style: inherit; color: rgb(103, 205, 204);">></span>
<span style="list-style: inherit; color: rgb(103, 205, 204);"><</span><span style="list-style: inherit; color: rgb(103, 205, 204);">/</span>beans<span style="list-style: inherit; color: rgb(103, 205, 204);">></span></pre><p style="margin-top: 0px; margin-bottom: 8px; list-style: inherit; min-height: 24px; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;">您可以查看Spring Hello World 示例以了解如何定义、配置和创建 Spring Bean。</p><p style="margin-top: 0px; margin-bottom: 8px; list-style: inherit; min-height: 24px; color: rgb(51, 51, 51); font-family: "pingfang SC", "helvetica neue", arial, "hiragino sans gb", "microsoft yahei ui", "microsoft yahei", simsun, sans-serif; white-space: pre-wrap;">我们将在单独的章节中讨论基于注解的配置。在开始使用带有注解的 Spring 依赖注入进行编程之前，我们有意在单独的章节中讨论它，因为我们希望您掌握一些其他重要的 Spring 概念。</p>
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